Each individual is a unique person with their original and typical features that distinguish them from others, and in order to distinguish these characteristics from each other, one reaches for certain methods of identification. Biometrics deals with the identification of an individual based on their physical and behavioral characteristics The paper considers biometric systems, that is, biometric identification resulting from the characteristics of an individual, by comparing it with a stored sample in the form of data in a database of a particular system. The development of technology has improved the identification of persons by biometric methods. Therefore, by applying them in commercial applications, government institutions and medical-forensic applications, any possibility of abuse due to the use of individual characteristics has been eliminated.